Not sure about the DA installation. My recommendation would be to call Edson and talk to them. I'm more than certain that they can steer you in the right direction (pun intended). They have no doubt heard this before and should be able to tell you what you need.
I installed the power adaptor that has the throttle on the right side and the transmission lever on the left side. I have a Yanmar diesel in mine, and it has a different transmission than the Atomic would have used, which necessitated using a different fitting at the transmission. I bought a new trans cable because the old one was sticking pretty badly. I had to change the routing of the cables, and just barely had enough length to make it to the levers. Best mod I could have done, in my opinion.